Not really. Some is only in French (most of the Topics doc.), some only
in English (first 6 parts of Vol 2) and some in both languages (Vol 1,
Vol 2 part 7, Vol 4 part 1, and most of modules documentation).

>Finally, could somebody provide me with a 1 line description
>or at least the title for each file? I would be interesting
>what's in file Thema53.pdf without opening it...

There is a summary in Volume 1, part 3 (note that this is an exception
to the above rules : Vol. 1 is in English, except for the paragraphs that
correspond to parts that are only in French) . For example, here is what
is said about 5.3: